Base Classes and Prestige Classes mix help

[Frodie]

Ok, I am not sure how to tackle this one. So, any ideas on a direction that would be very cool.

I have a feat (that can be taken multiple times) that grants an extra class custom ability (a modern Talent). The script works fine. The issue is it is for multiple classes with a mix of base classes and prestige classes. (This is for the MSRD classes of the modern files).

I have each class scripted and with a custom tag, all works great if there is only one class. The issue is when you start mixing classes.

The feat gives a class, one extra class custom ability, each time you take it. But if you have two classes, the feat gives a bonus to each class.

So any ideas on a direction to handle this.

I thought about a feat for each class, but I want to keep it down to a min.